code: def forward(self, x):
      return self.W(x)
  
file_path: dgl/examples/pytorch/ogc/utils.py
imports: import dgl.sparse
  import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 2 for calling the LinearNeuralNetwork obj's underlying member method code with example usage: obj.forward(x) and returns: self